I have the main unit, HP peripheral printer 82143A,
HP digital casette drive 82161A and HP printer 82240A
type calculator
country USA
year 1986
os HP
ram 2 KB
The HP 18C Business Consultant — RPN Financial Calculator
The HP 18C Business Consultant was a financial calculator from Hewlett-Packard’s celebrated calculator range — using the Reverse Polish Notation (RPN) entry system that HP had championed since the HP-35 of 1972. The 18C targeted business and financial professionals with functions for time value of money calculations, cash flow analysis, statistics, and business mathematics. HP’s financial calculators were considered the gold standard for business computing in the 1980s, used by bankers, accountants, and financial analysts who valued their accuracy, reliability, and the efficiency of RPN entry for complex financial calculations.